Details on Peterbilt 359 Firewall

[howsthat1959]

Can anyone tell me what the two cylinders are used for on the following Peterbilt 359 firewall? Thanks.

[clayton]

One is the AC drier( I think)

Two ????

[howsthat1959]

One is the AC drier( I think)

Two ????

I kind of thought one was a A/C dryer. Still don't know about #2

[scale trucker]

one should be ac drier the other should be air fan solonoid

[Mr mopar]

This should help you ?

[bricknick]

The large one on the left side (passenger side) is definitely the ac evaporater canister and the other air solenoid is for the air controlled windshield wiper motor.

[howsthat1959]

I have that picture of the firewall...and thanks for the info. Seems those things are the A/C drier and ww motor.

Thanks all.

[dad vader]

I am not trying to argue,but that series cab had individual air wiper motors,and were located under the dash. One on the left and one on the right.The air valve located in spot # 2 would be the selenoid and filter for the air controlled fan clutch. And as said before the one in location #1 is the reciever drier for the Air conditioner. In my 30 years as a mechanic I have changed many of both.

[trucknut10]

Hello Clayton, Have you thought of asking Tim. Tim is very up on Petes he knows Petes very well. His web page is www.timstrucks.com